Hot-air generator for fire-places



(No Model.)

J. S. DEARDORFF.

HOT AIR GENERATOR FOR FIRE PLACES.

No. 266,613. Patented Oct. 31, 1882.

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JESSE S. DEARDORFF, ()F CANAL DOVER, OlIlO.

HOT-AIR GENERATOR FOR FIRE-PLACES.

SPECIFICATION forming part of Letters Patent No. 266,613,dated October31, 1882.

(X0 model.)

To all whom it may concern:

Be it known that 1, Jesse S. DEARDORFF, a citizen of the United States,residing at Canal Dover, in the county of Tuscarawas and State of Ohio,have invented a new and useful Improvement in Hot-Air Generators forFire- Places, of which thefollowing isa specification.

My improvement relates to the class of hotair generators in whichchambers of metal or other material are placed at the rear and upperpart of a fire-place for receiving the heat from the fuel and flame andfrom the products of combustion escaping up the flue.

My invention consists in the arrangement of two chambers of metal orothersuitable material, placed one above the other in the back offire-place, the upper chamber being smaller than the lower, each of saidchambers, which are of irregular quadrilateral shape in verticalcross-section, being provided with a removablyattached corrugated frontplate,the upperplate having an overlapping upper edge, and the loweredge of the upper plate and the upper edge of the lower plate beingbeveled, so as to form a tightjoint, the said chambers being alsoprovided with suitable openings for the ingress, egress, and passage ofair.

Myinvention further consists in the combination of the two chambersconstructed as above stated, the upper chamber being provided with aseries of raised projections surrounding the egress opening or openingsin its top, for a purpose hereinafter set forth.

In order that my invention maybe fully understood, I will proceed todescribe it with reference to the accompanying drawings, forming part ofthis specification, in which- Figure l is a vertical section of afire-place with my improvements applied. Fig. 2 is a perspective viewot'the two chambers detached from their relative positions. Fig. 3 is asimilar view, showing the front plates detached from their relativepositions.

In the said drawings, 1 and 2 represent chambers, which may be made ofwrought or cast iron, or terracotta, or other suitable material, butpreferably of cast-iron, and rest one upon the other, as shown in Fig.1, the lower side of the upper and the upper side of the lower chamberbeing united by one or more vertical pipes or passages, 3, for passingair from one to the other chamber. Near the broad base 4: ot' the lowerchamber, 2, are one or more inlets, 5, for the inward passage of freshair.

In or near the broad top of the upper chamher, 1, are any desirablenumber of openings, 7, from which a corresponding number of flues orpipes, 8, extend upward through the chimney for conducting the heatedair to the sew eral apartmeutsot' the building, the upper ends of saidpipes or lines opening into registers of customary form. For the purposeof keeping the lower ends of these pipes in position the holes 7 aresurrounded each with a series of projections, 9, formed in the casting.

Each of the chambers 1 and 2 is of irregular quadrilateral shape, thefronts of which slant in opposite directions from their meeting line.The upper chamber, 1, is smaller than the lower chamber, 2, as shown,and they are provided with the removably-attached front plates, 1 2,respectively. At their meeting edges these plates are beveled, so as to(it closely when the chambers are in position. The upper edge of plate liscastwith a lapped portion,as shown, which forms a tight joint. Thesaid plates are secured in position by bolts 1 passing through holes inthe plates and into the body of the chamber, suitable nuts being screwedonto their threaded ends.

The lower chamber is set on a level with the bottom of the grate, asshown, so as to leave a space beneath it for the reception of an ashpan. The upper chamber rests on top of the lower chamber, as shown inthe drawings. The oppositely-slantingpositionsofthefrontplates, 1 2, isproductive of the most thorough action of the heat from the grate,inasmuch as the fuel rests against the lower plate and the upper plate 1projecting out over the tire receives the impact of the ascendingcurrents of air and gases. These plates are corrugated, as sh0wn,toincrease their et'ficiency. The flue or flues S are placed in the fluein such manner that the hot air ascending through them does not lose anyof its heat, but is kept hot by the gases in the chimney.

it will be seen that my front plates are easily detached and replaced bynew ones when they become burned out. The castings of the chambers arenot exposed to the action the fire, as they are incased in themasonry-work of the fire-back.

I am aware that fire-places have been heretofore provided withair-heatin g chambers set in masonry-work or otherwise, and. that it isnot new to provide such chambers with removable fronts. Hence I do notclaim such features, broadly; but,

Having thus described my invention, what I claim as new therein, is

1.- The chamber-l of irregular quadrilateral shape in verticalcross-section, and provided with the inlets 3, outlets 7, and theremovable corrugated front plate 1 with its overlapping upper edge andbeveled lower edge, in combination with the lower chamber, 2, of similarshape to chamber 1, but larger, and provided with inlets 5, outlets 3,and removable corru- JEssE s. DEARDOBFF. Witnesses:

JOHN A. HOSTETLER, JOSEPH H. HOSTETLER.

